Overview
The SN74HCS595 is an 8-bit serial-in, parallel-out shift register produced by Texas Instruments. This device is designed to operate over a wide voltage range of 2 V to 6 V, making it versatile for various applications. It features Schmitt-trigger inputs, which help in handling slow or noisy input signals, ensuring reliable data transfer. The device includes a direct overriding clear input, serial input, and serial output for cascading, along with separate clocks for both the shift and storage registers. The storage register has parallel 3-state outputs, which can be enabled or disabled using the output-enable (OE) input.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | - | 6 | V |
| Operating Free-Air Temperature (TA) | -40 | - | 125 | °C |
| Input Clamp Current (IIK) | - | - | ±20 | mA |
| Output Clamp Current (IOK) | - | - | ±35 | mA |
| Continuous Output Current (IO) | - | - | ±35 | mA |
| Propagation Delay (SRCLK to QH') | 14 | 19 | 28 | ns |
| Propagation Delay (RCLK to QA - QH) | 16 | 21 | 37 | ns |
| Transition Time (Any Output) | 9 | 16 | - | ns |
Key Features
- Wide operating voltage range: 2 V to 6 V
- Schmitt-trigger inputs for handling slow or noisy input signals
- Low power consumption: Typical ICC of 100 nA, typical input leakage current of ±100 nA
- High-current 3-state outputs: ±7.8-mA output drive at 6 V
- Extended ambient temperature range: –40°C to +125°C
- Separate clocks for shift and storage registers
- Direct overriding clear (SRCLR) input, serial (SER) input, and serial output (QH') for cascading
- Output-enable (OE) input to control 3-state outputs
- Balanced CMOS 3-state and push-pull outputs
Applications
- Output expansion
- LED matrix control
- 7-segment display control
- 8-bit data storage
- Network switches
- Power infrastructure
- Servers
Q & A
- What is the operating voltage range of the SN74HCS595?
The operating voltage range is from 2 V to 6 V.
- What type of inputs does the SN74HCS595 have?
The device features Schmitt-trigger inputs.
- What is the typical power consumption of the SN74HCS595?
The typical ICC is 100 nA, and the typical input leakage current is ±100 nA.
- What is the output drive capability of the SN74HCS595 at 6 V?
The device can drive up to ±7.8 mA at 6 V.
- What is the temperature range for the SN74HCS595?
The device operates over an ambient temperature range of –40°C to +125°C.
- Does the SN74HCS595 have separate clocks for the shift and storage registers?
Yes, separate clocks are provided for both the shift and storage registers.
- How do you clear the shift register in the SN74HCS595?
The shift register can be cleared using the direct overriding clear (SRCLR) input.
- What is the purpose of the output-enable (OE) input?
The OE input controls the 3-state outputs, enabling or disabling them.
- Can the SN74HCS595 be cascaded?
Yes, the device has a serial output (QH') for cascading.
- What types of outputs does the SN74HCS595 have?
The device has balanced CMOS 3-state and push-pull outputs.
